Sifu Sapir is a respected and valued member of the Israeli martial arts community. Over the years he had practiced and exchanged knowledge with many distinguished colleagues of his, from Israel and abroad. Among these are Avi Nardia sensei (KEPAP and Machado Jujutsu), Shihan Haim Bachar (9th Dan Kyokushin Kai), Sifu Juri Fleischmann (Wing Chun), Sifu Zachi Shohat (Pak Hok Pai), and others. He is also the teacher of famous Israeli martial arts author, shifu Jonathan Bluestein.          
Over the years, sifu Sapir has instructed in and for countless martial arts, military, law enforcements, correctional facility officers, and other schools and organizations. From the Israeli Police to the NYPD, the IDF and the Shin Beit, as well as Japanese SWAT teams and various Karate and Kung Fu clubs – many have experienced and loved the Spikey tool and the Spikey System.